﻿/* BDVB-App
Copyright (C) 2014 Sascha Manns <Sascha.Manns@outlook.de>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/


using System;

using Windows.System;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

namespace AppStudio.Controls
{
    public class VariableSizedGrid : GridView
    {
       private Int32 _positionOfItemAtArray = 0;

        protected override void OnItemsChanged(object element)
        {
            this._positionOfItemAtArray = 0;
            base.OnItemsChanged(element);
        }

        protected override void PrepareContainerForItemOverride(
          DependencyObject element, object item)
        {
            int spanProperty = this.CalcuateSpanProperty();

            element.SetValue(Windows.UI.Xaml.Controls.VariableSizedWrapGrid.ColumnSpanProperty, spanProperty);
            element.SetValue(Windows.UI.Xaml.Controls.VariableSizedWrapGrid.RowSpanProperty, spanProperty);

            this._positionOfItemAtArray++;
            base.PrepareContainerForItemOverride(element, item);
        }

        private int CalcuateSpanProperty()
        {
            return this._positionOfItemAtArray % 3 == 0 ? 2 : 1;
        }
    }
}
